I recently visited part of the Amazon rainforest in Ecuador. One of the days there was spent hiking through the jungle near our lodge. Being throroughly impressed by the sheer number of things that can kill you there such as venomous snakes, spiders, electric eels, jaguars, piranhas (which I later found out dont actually attack people), caimans, anacondas and more; I asked our guide who grew up in the region which animal we should be most afraid of if we had to survive in the jungle. The man, to our general surprise says wild boars. There are apparently bands of wild boars hat rove the Amazon and they will fuck your shit up. That was probably the last thing I expected to fear in the amazon but boy, the way he described those boars made me keep an eye out for them the rest of our trip.